Dionne Warwick attends the 47th Golden Camera Awards at the Axel Springer Haus on Feb. 4, 2012 in Berlin, Germany

*Dionne Warwick has postponed a Valentine’s Day concert at a western Pennsylvania theater after the death of her cousin Whitney Houston, reports the AP.

The Grammy Award-winning singer’s concert at The Palace Theater in Greensburg will instead be held March 2. Tickets for Tuesday night’s concert will be honored for the new show.

Houston was found dead in her suite at the Beverly Hilton Hotel in Los Angeles on Saturday. The cause of her death is being investigated.